/* NOTICE
    OpenJaWS - Open Java Weather Station
    
    Copyright (C) 2008 Grant Gardner <grant@lastweekend.com.au>
    
    OpenJaWS is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
NOTICE */

package au.com.lastweekend.openjaws.plugins;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;

import javax.annotation.PostConstruct;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import au.com.lastweekend.openjaws.api.Readings;
import au.com.lastweekend.openjaws.api.WeatherPluginException;

/**
 * Write the readings to a file
 * 
 * @author ggardner
 * 
 */
public class TextFilePlugin extends AbstractWeatherPlugin {

    public static final Logger LOG = LoggerFactory.getLogger(TextFilePlugin.class);
    private File outputFile;

    @PostConstruct
    public void init() {

        if (isEnabled()) {
            LOG.info("Enabled, outputFile=" + outputFile.getAbsolutePath());
        } else {
            LOG.info("Disabled");
        }
    }

    public void processReadings(Readings readings) throws WeatherPluginException {

        PrintWriter writer = null;
        try {
            boolean writeHeadings = !outputFile.exists();
            writer = new PrintWriter(new FileOutputStream(this.outputFile, true));
            writer.write(readings.format(writeHeadings, true, true, false));
            writer.flush();

        } catch (IOException e) {
            throw new WeatherPluginException(e);
        } finally {
            if (writer != null) {
                writer.close();
            }
        }

    }

    @Override
    public boolean isEnabled() {

        return super.isEnabled() && outputFile != null;
    }

    public File getOutputFile() {

        return outputFile;
    }

    /**
     * 
     * @param outputFile
     *            the file to write to
     */
    public void setOutputFile(File outputFile) {

        this.outputFile = outputFile;
    }

}
